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1 // Copyright Louis Dionne 2013-2017
2 // Distributed under the Boost Software License, Version 1.0.
3 // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
5 #include <boost/hana/assert.hpp>
6 #include <boost/hana/optional.hpp>
7 namespace hana
= boost::hana
;
10 constexpr auto just_x
= hana::just('x');
11 BOOST_HANA_CONSTANT_CHECK(hana::is_just(just_x
));